package com.heima.search.service.impl;

import com.alibaba.fastjson.JSON;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.search.dtos.UserSearchDto;
import com.heima.model.user.pojos.ApUser;
import com.heima.search.service.ApUserSearchService;
import com.heima.search.service.ArticleSearchService;
import com.heima.utils.thread.AppThreadLocalUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.index.query.*;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightUtils;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

@Service
@Slf4j
public class ArticleSearchServiceImpl implements ArticleSearchService {

    @Autowired
    private RestHighLevelClient restHighLevelClient;
    @Autowired
    private ApUserSearchService apUserSearchService;


    /**
     * es文章分页检索
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult search(UserSearchDto dto) throws IOException {

        //1.检查参数
        if (dto == null || StringUtils.isBlank(dto.getSearchWords())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        Integer userID = AppThreadLocalUtil.getUserID();

        //异步调用 保存搜索记录
        if (userID != null && dto.getFromIndex() == 0) {
            apUserSearchService.insert(dto.getSearchWords(), userID);
        }

        //2.设置查询条件

        SearchRequest searchRequest = new SearchRequest("app_info_article");
        searchRequest.source(SearchSourceBuilder.searchSource()
                .query(QueryBuilders.boolQuery()
                        .must(QueryBuilders
                                .queryStringQuery(dto.getSearchWords())
                                .field("title").field("content")
                                .defaultOperator(Operator.OR))
                        .filter(QueryBuilders
                                .rangeQuery("publishTime")
                                .lt(dto.getMinBehotTime().getTime())))
                .from(0)
                .size(dto.getPageSize())
                .sort("publishTime", SortOrder.DESC)
                .highlighter(new HighlightBuilder().field("title")
                        .preTags("<font style='color: red; font-size: inherit;'>")
                        .postTags("</font>")));

//
//        SearchSourceBuilder searchSourceBuilder = SearchSourceBuilder.searchSource();
//
//        //布尔查询
//        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
//
//        //关键字的分词之后查询
//        QueryStringQueryBuilder queryStringQueryBuilder = QueryBuilders
//                .queryStringQuery(dto.getSearchWords())
//                .field("title").field("content")
//                .defaultOperator(Operator.OR);
//        boolQueryBuilder.must(queryStringQueryBuilder);
//
//        //查询小于mindate的数据
//        RangeQueryBuilder rangeQueryBuilder = QueryBuilders.rangeQuery("publishTime").lt(dto.getMinBehotTime().getTime());
//        boolQueryBuilder.filter(rangeQueryBuilder);
//
//        //分页查询
//        searchSourceBuilder.from(0);
//        searchSourceBuilder.size(dto.getPageSize());
//
//        //按照发布时间倒序查询
//        searchSourceBuilder.sort("publishTime", SortOrder.DESC);
//
//        //设置高亮  title
//        HighlightBuilder highlightBuilder = new HighlightBuilder();
//        highlightBuilder.field("title");
//        highlightBuilder.preTags("<font style='color: red; font-size: inherit;'>");
//        highlightBuilder.postTags("</font>");
//        searchSourceBuilder.highlighter(highlightBuilder);
//
//
//        searchSourceBuilder.query(boolQueryBuilder);
//        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);


        //3.结果封装返回

        List<Map> list = new ArrayList<>();

        SearchHit[] hits = searchResponse.getHits().getHits();
        for (SearchHit hit : hits) {
            String json = hit.getSourceAsString();
            Map map = JSON.parseObject(json, Map.class);
            //处理高亮
            if (hit.getHighlightFields() != null && hit.getHighlightFields().size() > 0) {
                Text[] titles = hit.getHighlightFields().get("title").getFragments();
                String title = StringUtils.join(titles);
                //高亮标题
                map.put("h_title", title);
            } else {
                //原始标题
                map.put("h_title", map.get("title"));
            }
            list.add(map);
        }

        return ResponseResult.okResult(list);

    }
}